The continuous melting technology is reported. The 400 mm aperture N31 Nd:phosphate laser glass prepared from continuous melting technology is fabricated. The main properties of N31-35 glass have been disclosed. Its Nd3 + ion concentration is 3.47 (± 0.02)× 1020 cm-3. The refractive index at 1053 nm is 1.5336 ±0.0005. The absorption coefficients at 400 nm and 3000 cm-1, the laser wavelength loss at 1053 nm are 0.098 cm-1 and 0.83 cm-1, 0.13~0.15% cm-1, respectively. The PV value of transmitted wavefront is less than λ/3 at 633 nm. Its bulk damage threshold with 1053 nm, 3 ns pulse laser is larger than 40 J/cm2. The results indicate that the dehydration and platinum particle removing processes are very effective during the continuous melting.